#changeur {
    position: absolute;
    top: 17px;
    margin-left: 20px;
    width: 70px;
    height: 31px;
    background-color: #CBCBCB;
    border-radius: 50px;
    box-shadow: inset 1px 1px 20px 0px #00000028;
}

.cercle {
    position: absolute;
    top: 0.5px;
    left: 2px;
    width: 30px;
    height: 30px;
    background: linear-gradient(to bottom, #fff, #ecebeb);
    border-radius: 50%;
    box-shadow: 1px 1px 10px 2px #0000003f, inset 0.5px 0.5px 2px #0000003f;
}

#changeur.active .cercle {
    left: 39px;
    background: linear-gradient(to bottom, #464545, #2c2d2c);
    box-shadow: 1px 1px 10px 2px #0000003f, inset 0.5px 0.5px 2px #0000003f;
}

main.active  {
    background-color: #2c2d2c;
}

#logoNuit.active {
    display: inherit;
}

#logoJour.active {
    display: none;
}